CH266558A - Process for the preparation of a copper-compatible polyazo dye. - Google Patents

Process for the preparation of a copper-compatible polyazo dye.

Info

Publication number
CH266558A
CH266558A CH266558DA CH266558A CH 266558 A CH266558 A CH 266558A CH 266558D A CH266558D A CH 266558DA CH 266558 A CH266558 A CH 266558A
Authority
CH
Switzerland
Prior art keywords
acid
dye
copper
compatible
preparation
Prior art date
Application number
Other languages
German (de)
Inventor
Ag J R Geigy
Original Assignee
Ag J R Geigy
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ag J R Geigy filed Critical Ag J R Geigy
Publication of CH266558A publication Critical patent/CH266558A/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
    • C09B35/00—Disazo and polyazo dyes of the type A<-D->B prepared by diazotising and coupling
    • C09B35/50—Tetrazo dyes
    • C09B35/52—Tetrazo dyes of the type
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
    • C09B35/00—Disazo and polyazo dyes of the type A<-D->B prepared by diazotising and coupling
    • C09B35/38—Trisazo dyes ot the type
    • C09B35/44—Trisazo dyes ot the type the component K being a hydroxy amine
    • C09B35/46—Trisazo dyes ot the type the component K being a hydroxy amine the component K being an amino naphthol
    • C09B35/463—D being derived from diaminodiphenyl
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
    • C09B35/00—Disazo and polyazo dyes of the type A<-D->B prepared by diazotising and coupling
    • C09B35/38—Trisazo dyes ot the type
    • C09B35/44—Trisazo dyes ot the type the component K being a hydroxy amine
    • C09B35/46—Trisazo dyes ot the type the component K being a hydroxy amine the component K being an amino naphthol
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
    • C09B35/00—Disazo and polyazo dyes of the type A<-D->B prepared by diazotising and coupling
    • C09B35/50—Tetrazo dyes
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
    • C09B35/00—Disazo and polyazo dyes of the type A<-D->B prepared by diazotising and coupling
    • C09B35/50—Tetrazo dyes
    • C09B35/60—Tetrazo dyes of the type

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Coloring (AREA)
  • Paper (AREA)
  • Artificial Filaments (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Thiazole And Isothizaole Compounds (AREA)

Description

  

  <B>Zusatzpatent</B> zum Hauptpatent Nr.<B>236584.</B>    Verfahren zur Herstellung eines kupferbaren     Polyazofarbstoffes.       Gegenstand vorliegenden Patentes ist ein  Verfahren zur Herstellung eines kupferbaren       Polyazofarbstoffes.    Das Verfahren ist dadurch  gekennzeichnet, dass man 1     11o1        tetrazotiertes          4,4'-Diamino-3,

  3'-dimethoxy-diphenyl    einer  seits mit 1     Mol    des sauer gekuppelten     Mono-          azofarbstoffes        aus        diazotierter        5-Nitro        Z-amino-          benzoesäure    und     2-(ss-Oxy-iithylamino)-5-oxy-          naphtlialin-7-sulfonsäure    und anderseits mit  1     12o1        Salicylsäure    kuppelt.  



  Der neue     Trisazofarbstoff    stellt ein schwar  zes Pulver dar, welches sich in Wasser mit  violetter und in konzentrierter Schwefelsäure  mit blauer Farbe löst und     Cellulosefasern          nachgekupfert    in einem     rotstichigen    Schwarz  von ausgezeichneter     M'ascli-    und     Liehteehtheit     färbt.  



  <I>Beispiel:</I>  24,4 Teile     4,4'-Diamiiio-3,3'-dimethoxy-di-          phenyl    werden wie üblich     tetrazotiert    und mit.  15,3 Teilen     Salicylsäure    und 30 Teilen Soda  vereinigt. Sobald die Bildung des Zwischen  produktes beendet ist, lässt man dasselbe in  eine Lösung- von 47,6 Teilen eines durch saure    Kupplung von     diazotierter        5-Nitro-2-amino-          benzoesäure    mit     2-(,ss-0xy-äthylamino)-5-oxy-          naphthalin-7-sulfonsäure    erhaltenen     Monoazo-          farbstoffes    in Gegenwart von 15 Teilen Soda  einlaufen.

   Der fertiggebildete Farbstoff wird  mit Kochsalz abgeschieden, filtriert und ge  trocknet.



  <B> Additional patent </B> to main patent no. <B> 236584. </B> Process for the production of a copper-compatible polyazo dye. The present patent relates to a process for the preparation of a copperable polyazo dye. The process is characterized in that 1 11o1 tetrazotized 4,4'-diamino-3,

  3'-dimethoxy-diphenyl on the one hand with 1 mol of the acid-coupled monoazo dye from diazotized 5-nitro-Z-aminobenzoic acid and 2- (β-oxy-iithylamino) -5-oxynaphthlialin-7-sulfonic acid and on the other hand with 1 12o1 salicylic acid couples.



  The new trisazo dye is a black powder, which dissolves in water with violet and in concentrated sulfuric acid with blue color and after-coppered cellulose fibers in a reddish black with excellent m'ascli and lightness.



  <I> Example: </I> 24.4 parts 4,4'-diamiiio-3,3'-dimethoxy-diphenyl are tetrazotized as usual and with. 15.3 parts of salicylic acid and 30 parts of soda combined. As soon as the formation of the intermediate product has ended, the same is left in a solution of 47.6 parts of a 5-nitro-2-aminobenzoic acid diazotized by acidic coupling with 2 - (, ss-oxy-ethylamino) -5- oxynaphthalene-7-sulfonic acid obtained monoazo dye in the presence of 15 parts of soda.

   The finished dye is precipitated with common salt, filtered and dried.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines kupfer baren Polyazofarbstoffes, dadurch gekenn zeichnet, dass man 1 Mol tetrazotiertes 4,4-, Diamino-3,3'-climethoxy-diphenyl einerseits mit 1 lIol des sauer gekuppelten Monoazofarbstof- fes aus dianotierter 5-Nitro-2-amino-benzoe- säure und 2-(ss-Oxy-äthylamino)-5-oxy-naph- thalin-7-sulfonsäure und anderseits mit 1 Mol . PATENT CLAIM: Process for the production of a copper-free polyazo dye, characterized in that 1 mol of tetrazotized 4,4-, diamino-3,3'-climethoxy-diphenyl is mixed with 1 lol of the acid-coupled monoazo dye from dianotated 5-nitro 2-amino-benzoic acid and 2- (ss-oxy-ethylamino) -5-oxy-naphthalene-7-sulfonic acid and on the other hand with 1 mol. Salicylsäure kuppelt. Der neue Trisazofarbstoff stellt, ein schwar zes Pulver dar, welches sich in Wasser mit violetter Lind in konzentrierter Schwefelsäure mit blauer Farbe löst und Cellulosefasern nachgekupfert in einem rotstichigen Schwarz von ausgezeichneter 1Vasch- und Lichtechtheit färbt. Salicylic acid couples. The new trisazo dye is a black powder, which dissolves in water with violet and concentrated sulfuric acid with a blue color and after-coppered cellulose fibers in a reddish black with excellent resistance to ash and light.
CH266558D 1946-08-02 1946-08-02 Process for the preparation of a copper-compatible polyazo dye. CH266558A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH236584T 1946-08-02
CH266558T 1946-08-02

Publications (1)

Publication Number Publication Date
CH266558A true CH266558A (en) 1950-01-31

Family

ID=4459528

Family Applications (41)

Application Number Title Priority Date Filing Date
CH238451D CH238451A (en) 1942-12-22 1942-12-22 Process for the preparation of a copper-compatible polyazo dye.
CH238457D CH238457A (en) 1942-12-22 1942-12-22 Process for the preparation of a copper-compatible polyazo dye.
CH236584D CH236584A (en) 1946-08-02 1942-12-22 Process for the preparation of a copper-compatible polyazo dye.
CH238456D CH238456A (en) 1942-12-22 1942-12-22 Process for the preparation of a copper-compatible polyazo dye.
CH238452D CH238452A (en) 1942-12-22 1942-12-22 Process for the preparation of a copper-compatible polyazo dye.
CH238458D CH238458A (en) 1942-12-22 1942-12-22 Process for the preparation of a copper-compatible polyazo dye.
CH238453D CH238453A (en) 1942-12-22 1942-12-22 Process for the preparation of a copper-compatible polyazo dye.
CH238455D CH238455A (en) 1942-12-22 1942-12-22 Process for the preparation of a copper-compatible polyazo dye.
CH238459D CH238459A (en) 1942-12-22 1942-12-22 Process for the preparation of a copper-compatible polyazo dye.
CH238454D CH238454A (en) 1942-12-22 1942-12-22 Process for the preparation of a copper-compatible polyazo dye.
CH250816D CH250816A (en) 1943-03-09 1943-03-09 Process for the preparation of a new copper-compatible polyazo dye.
CH240718D CH240718A (en) 1943-03-09 1943-03-09 Process for the production of a new copper-compatible polyazo dye.
CH250815D CH250815A (en) 1943-03-09 1943-03-09 Process for the preparation of a new copper-compatible polyazo dye.
CH250811D CH250811A (en) 1943-03-09 1943-03-09 Process for the preparation of a new copper-compatible polyazo dye.
CH250817D CH250817A (en) 1943-03-09 1943-03-09 Process for the preparation of a new copper-compatible polyazo dye.
CH250813D CH250813A (en) 1943-03-09 1943-03-09 Process for the preparation of a new copper-compatible polyazo dye.
CH250812D CH250812A (en) 1943-03-09 1943-03-09 Process for the preparation of a new copper-compatible polyazo dye.
CH250818D CH250818A (en) 1943-03-09 1943-03-09 Process for the preparation of a new copper-compatible polyazo dye.
CH250819D CH250819A (en) 1943-03-09 1943-03-09 Process for the preparation of a new copper-compatible polyazo dye.
CH250814D CH250814A (en) 1943-03-09 1943-03-09 Process for the preparation of a new copper-compatible polyazo dye.
CH242502D CH242502A (en) 1943-10-14 1943-10-14 Process for the preparation of a copper-compatible polyazo dye.
CH242498D CH242498A (en) 1943-10-14 1943-10-14 Process for the preparation of a copper-compatible polyazo dye.
CH242508D CH242508A (en) 1943-10-14 1943-10-14 Process for the preparation of a copper-compatible polyazo dye.
CH241824D CH241824A (en) 1943-10-14 1943-10-14 Process for the preparation of a copper-compatible polyazo dye.
CH242499D CH242499A (en) 1943-10-14 1943-10-14 Process for the preparation of a copper-compatible polyazo dye.
CH242504D CH242504A (en) 1943-10-14 1943-10-14 Process for the preparation of a copper-compatible polyazo dye.
CH242506D CH242506A (en) 1943-10-14 1943-10-14 Process for the preparation of a copper-compatible polyazo dye.
CH242501D CH242501A (en) 1943-10-14 1943-10-14 Process for the preparation of a copper-compatible polyazo dye.
CH242497D CH242497A (en) 1943-10-14 1943-10-14 Process for the preparation of a copper-compatible polyazo dye.
CH242507D CH242507A (en) 1943-10-14 1943-10-14 Process for the preparation of a copper-compatible polyazo dye.
CH242500D CH242500A (en) 1943-10-14 1943-10-14 Process for the preparation of a copper-compatible polyazo dye.
CH242505D CH242505A (en) 1943-10-14 1943-10-14 Process for the preparation of a copper-compatible polyazo dye.
CH242503D CH242503A (en) 1943-10-14 1943-10-14 Process for the preparation of a copper-compatible polyazo dye.
CH259032D CH259032A (en) 1946-08-02 1946-08-02 Process for the preparation of a copper-compatible polyazo dye.
CH259033D CH259033A (en) 1946-08-02 1946-08-02 Process for the preparation of a copper-compatible polyazo dye.
CH266559D CH266559A (en) 1946-08-02 1946-08-02 Process for the preparation of a copper-compatible polyazo dye.
CH266560D CH266560A (en) 1946-08-02 1946-08-02 Process for the preparation of a copper-compatible polyazo dye.
CH259031D CH259031A (en) 1946-08-02 1946-08-02 Process for the preparation of a copper-compatible polyazo dye.
CH266557D CH266557A (en) 1946-08-02 1946-08-02 Process for the preparation of a copper-compatible polyazo dye.
CH259717D CH259717A (en) 1946-08-02 1946-08-02 Process for the preparation of a copper-compatible polyazo dye.
CH266558D CH266558A (en) 1946-08-02 1946-08-02 Process for the preparation of a copper-compatible polyazo dye.

Family Applications Before (40)

Application Number Title Priority Date Filing Date
CH238451D CH238451A (en) 1942-12-22 1942-12-22 Process for the preparation of a copper-compatible polyazo dye.
CH238457D CH238457A (en) 1942-12-22 1942-12-22 Process for the preparation of a copper-compatible polyazo dye.
CH236584D CH236584A (en) 1946-08-02 1942-12-22 Process for the preparation of a copper-compatible polyazo dye.
CH238456D CH238456A (en) 1942-12-22 1942-12-22 Process for the preparation of a copper-compatible polyazo dye.
CH238452D CH238452A (en) 1942-12-22 1942-12-22 Process for the preparation of a copper-compatible polyazo dye.
CH238458D CH238458A (en) 1942-12-22 1942-12-22 Process for the preparation of a copper-compatible polyazo dye.
CH238453D CH238453A (en) 1942-12-22 1942-12-22 Process for the preparation of a copper-compatible polyazo dye.
CH238455D CH238455A (en) 1942-12-22 1942-12-22 Process for the preparation of a copper-compatible polyazo dye.
CH238459D CH238459A (en) 1942-12-22 1942-12-22 Process for the preparation of a copper-compatible polyazo dye.
CH238454D CH238454A (en) 1942-12-22 1942-12-22 Process for the preparation of a copper-compatible polyazo dye.
CH250816D CH250816A (en) 1943-03-09 1943-03-09 Process for the preparation of a new copper-compatible polyazo dye.
CH240718D CH240718A (en) 1943-03-09 1943-03-09 Process for the production of a new copper-compatible polyazo dye.
CH250815D CH250815A (en) 1943-03-09 1943-03-09 Process for the preparation of a new copper-compatible polyazo dye.
CH250811D CH250811A (en) 1943-03-09 1943-03-09 Process for the preparation of a new copper-compatible polyazo dye.
CH250817D CH250817A (en) 1943-03-09 1943-03-09 Process for the preparation of a new copper-compatible polyazo dye.
CH250813D CH250813A (en) 1943-03-09 1943-03-09 Process for the preparation of a new copper-compatible polyazo dye.
CH250812D CH250812A (en) 1943-03-09 1943-03-09 Process for the preparation of a new copper-compatible polyazo dye.
CH250818D CH250818A (en) 1943-03-09 1943-03-09 Process for the preparation of a new copper-compatible polyazo dye.
CH250819D CH250819A (en) 1943-03-09 1943-03-09 Process for the preparation of a new copper-compatible polyazo dye.
CH250814D CH250814A (en) 1943-03-09 1943-03-09 Process for the preparation of a new copper-compatible polyazo dye.
CH242502D CH242502A (en) 1943-10-14 1943-10-14 Process for the preparation of a copper-compatible polyazo dye.
CH242498D CH242498A (en) 1943-10-14 1943-10-14 Process for the preparation of a copper-compatible polyazo dye.
CH242508D CH242508A (en) 1943-10-14 1943-10-14 Process for the preparation of a copper-compatible polyazo dye.
CH241824D CH241824A (en) 1943-10-14 1943-10-14 Process for the preparation of a copper-compatible polyazo dye.
CH242499D CH242499A (en) 1943-10-14 1943-10-14 Process for the preparation of a copper-compatible polyazo dye.
CH242504D CH242504A (en) 1943-10-14 1943-10-14 Process for the preparation of a copper-compatible polyazo dye.
CH242506D CH242506A (en) 1943-10-14 1943-10-14 Process for the preparation of a copper-compatible polyazo dye.
CH242501D CH242501A (en) 1943-10-14 1943-10-14 Process for the preparation of a copper-compatible polyazo dye.
CH242497D CH242497A (en) 1943-10-14 1943-10-14 Process for the preparation of a copper-compatible polyazo dye.
CH242507D CH242507A (en) 1943-10-14 1943-10-14 Process for the preparation of a copper-compatible polyazo dye.
CH242500D CH242500A (en) 1943-10-14 1943-10-14 Process for the preparation of a copper-compatible polyazo dye.
CH242505D CH242505A (en) 1943-10-14 1943-10-14 Process for the preparation of a copper-compatible polyazo dye.
CH242503D CH242503A (en) 1943-10-14 1943-10-14 Process for the preparation of a copper-compatible polyazo dye.
CH259032D CH259032A (en) 1946-08-02 1946-08-02 Process for the preparation of a copper-compatible polyazo dye.
CH259033D CH259033A (en) 1946-08-02 1946-08-02 Process for the preparation of a copper-compatible polyazo dye.
CH266559D CH266559A (en) 1946-08-02 1946-08-02 Process for the preparation of a copper-compatible polyazo dye.
CH266560D CH266560A (en) 1946-08-02 1946-08-02 Process for the preparation of a copper-compatible polyazo dye.
CH259031D CH259031A (en) 1946-08-02 1946-08-02 Process for the preparation of a copper-compatible polyazo dye.
CH266557D CH266557A (en) 1946-08-02 1946-08-02 Process for the preparation of a copper-compatible polyazo dye.
CH259717D CH259717A (en) 1946-08-02 1946-08-02 Process for the preparation of a copper-compatible polyazo dye.

Country Status (6)

Country Link
US (1) US2507754A (en)
AT (3) AT162946B (en)
CH (41) CH238451A (en)
DE (2) DE880377C (en)
ES (2) ES179168A2 (en)
GB (2) GB639866A (en)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2714587A (en) * 1951-02-17 1955-08-02 Sandoz Ag Azo dyestuffs
US2710859A (en) * 1951-09-21 1955-06-14 Sandoz Ag Trisazo dyestuffs
US2842539A (en) * 1952-10-20 1958-07-08 Saul & Co Polyazo dyestuffs
DE1047966B (en) * 1952-10-20 1958-12-31 Sandoz Ag Process for the preparation of polyazo dyes
US2842538A (en) * 1952-10-20 1958-07-08 Saul & Co Polyazo dyestuffs
US2762793A (en) * 1953-10-14 1956-09-11 Ciba Ltd Tetrakisazo-dyestuffs
US2958689A (en) * 1954-07-01 1960-11-01 Sandoz Ag Metallizable hexakisazo dyestuffs
CH326965A (en) * 1954-07-16 1958-01-15 Sandoz Ag Process for the preparation of polyazo dyes
US2941991A (en) * 1954-10-12 1960-06-21 Saul & Co Metal-containing polyazo dyestuffs
DE1052015B (en) * 1954-10-18 1959-03-05 Sandoz Ag Process for the preparation of polyazo dyes
US2817658A (en) * 1954-12-03 1957-12-24 Geigy Ag J R Metallisable trisazo dyestuffs
DE1059594B (en) * 1954-12-03 1959-06-18 Geigy Ag J R Process for the production of metallizable trisazo dyes
DE1064659B (en) * 1955-06-03 1959-09-03 Sandoz Ag Process for the production of copperable polyazo dyes
EP4083175A4 (en) 2019-12-24 2023-09-13 Mitsubishi Gas Chemical Company, Inc. a-HYDROXYISOBUTYRIC ACID ESTER COMPOUND AND FRAGRANCE COMPOSITION

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR474331A (en) * 1913-11-20 1915-02-17 Soc Ind Chimique Bale Process for the production of new substantive azo dyes
US1901387A (en) * 1931-03-09 1933-03-14 Gen Aniline Works Inc Azodyestuffs
FR818154A (en) * 1936-02-21 1937-09-20 Ig Farbenindustrie Ag Azo dyes and their production process
US2243020A (en) * 1938-07-25 1941-05-20 Soc Of Chemical Ind Process for producing fast tints on cellulose fibers
US2277262A (en) * 1939-01-25 1942-03-24 Gen Aniline & Film Corp Azo dyestuffs
GB543100A (en) * 1939-07-29 1942-02-10 Chem Ind Basel Manufacture of dyestuffs of the triazole series
US2268935A (en) * 1939-07-29 1942-01-06 Soc Of Chemical Ind Dyestuffs of the triazol series and process of making same
US2417306A (en) * 1942-12-22 1947-03-11 Geigy Ag J R Metallizable polyazo dyes from benzidine intermediates

Also Published As

Publication number Publication date
CH242497A (en) 1946-05-15
DE888906C (en) 1953-09-07
CH242498A (en) 1946-05-15
CH238458A (en) 1945-07-15
CH259717A (en) 1949-01-31
CH242505A (en) 1946-05-15
CH238459A (en) 1945-07-15
ES179168A2 (en) 1947-10-01
CH250812A (en) 1947-09-15
CH266560A (en) 1950-01-31
CH240718A (en) 1946-01-15
CH241824A (en) 1946-03-31
CH259031A (en) 1948-12-31
CH250819A (en) 1947-09-15
CH238454A (en) 1945-07-15
CH250811A (en) 1947-09-15
GB633166A (en) 1949-12-12
CH242502A (en) 1946-05-15
AT183492B (en) 1955-10-10
CH242503A (en) 1946-05-15
CH238453A (en) 1945-07-15
CH238455A (en) 1945-07-15
CH238457A (en) 1945-07-15
CH242506A (en) 1946-05-15
CH242504A (en) 1946-05-15
CH242499A (en) 1946-05-15
CH259033A (en) 1948-12-31
CH250816A (en) 1947-09-15
CH242508A (en) 1946-05-15
CH238452A (en) 1945-07-15
CH238456A (en) 1945-07-15
ES179169A2 (en) 1947-10-01
DE880377C (en) 1953-06-22
GB639866A (en) 1950-07-05
CH259032A (en) 1948-12-31
CH238451A (en) 1945-07-15
CH250818A (en) 1947-09-15
US2507754A (en) 1950-05-16
CH236584A (en) 1945-02-28
CH242501A (en) 1946-05-15
CH250813A (en) 1947-09-15
CH250814A (en) 1947-09-15
AT183493B (en) 1955-10-10
CH266557A (en) 1950-01-31
CH250815A (en) 1947-09-15
CH242507A (en) 1946-05-15
AT162946B (en) 1949-04-25
CH242500A (en) 1946-05-15
CH250817A (en) 1947-09-15
CH266559A (en) 1950-01-31

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